Device to prevent vibration of bobbins



Nev. 3,1925- v W. H. WAKEFIELD DEVICE TO PREVENT VIBRATION OF 4BOBBTNS c o o o o o o o o o l.- nw V d'. o F o o o o` L o o MIL o 3 arch 27. 1924 as um @i Patented Nov. 3, 1925.

WALTER H. -WAKEFIELD, OF WORCESTER,

&; KNOWLES LOOM WORKS, OF WORCES MASSACHUSETTS.

MASSACHUSETTS, assrenon vTo CROMPTON TER, MAssAcHsET'Ts, A con'ro'RATIolNpi" DEVICE To PREVENT vIBmiTIoN or BoBBINs,

Application IedMarch 27, 192,4. Serial No.r7g2,41v5. f

To all whom t may concern.'

.Be it known that I, VVALTnR LH. INTAKE FIELD, a citizen of the United States, Vresiding at Vorcester, ,in the county of'l/Vorcester and State of Massachusetts, have invented a Anew and useful Device to Prevent Vibration `of Bobbins, of which the following is a ,specification.

This invention relates to improvements inv weft replenishing mechanism for looms, and more particularly to means for preventing the vibration of bobbinsas they await transfer.

`In the usual form of multi-color weft replenishing mechanism th ebobb ins are held in a plurality of substantially parallel vertical compartments and are released to move to transfer position by verticalslides which are under the joint control of the weft detecting mechanism and theboX motion. The vertical slides oscillate sofcalled cradles7 which are .normally empty but upon indication of substantial weft exhaustion inany of the shuttles, the cradle corresponding to the indicating shuttle is rocked by the slide operatively connected therewith to receive the lowermost bobbin in the associated compartinent. The shuttle is then picked across the loom with the vertical slide in raised position and the cradleoccupied rby a bobbin. If the shuttle then moves out of action immediately upon arriving at the b oX end of the loom, the slide remains in raised position until the shuttle again becomes active, at which time the slide is lowered and thebobbin in the corresponding cradle is moved to transfer position. V

In such devices it has been found that the bobbins vibrate on their axes to such an eX- tent as to cause objectionable tangling of the ends which extend to the thread holder so that a break of the filling is likely to occur.

I t is the principal object of my present invention to provide a multicolor weft replenishing mechanism with devices normally positioned to prevent vibration of thebobbins and under control ofthe replenishing mechanism but actuated to release the bobbins temporarily at the time of indication only. Immediately after the initial movementofthe bobbin toward transfer position,

the lrestraining device is moved against vthe,

bobbiiis'to prevent their rotation,'thereturn ofthegdevices to bobbin engaging position being independent of Vthe length of ,time which may elapseibefwenindicaties Olf 'treft exhaustion and ,subsequent return of the indicatinfr shuttle.

Y Anotherobject of my iinventionis to` provide a Vreplenishing.mechanism with a plu- `of a plurality of .pairs .ofl`,bobbin,conipart {rality of pivoted' ,walls `.which :formv parts ments, the walls being normally held infbobbin restraining positionby la single Aresilient device which servesnot only ','to :restrain rotation ofthe bobbins :but also ito placet-he control member in' operative relationship with its actuator.

A furtherobject of invention is ,to'pro-n A'.

vide Va 1plurality ofy pairs of coriipartments from a single Jmemberbut sohifelat'edf that a four color mechanism, e. g., Y weave with two compartments only without disturbing the bobbin lrestraining mechanism. y

I/Vith these and other objects in view with bobbin restraining walls all controlled f ,canV be us'edjto .which will appearbas the descriptionplTO- ceeds, my invention resides Lthe arrangement and combination of parts hereinafter described ,and set forth in the claims. Y

In the accompanying drawingszwherein I have shown a: convenient form of `my inven-` tion, K

Fig. l is a side elevation of a four color weft replenishing mechanism as .VrWed from the center of the `loom and havingfmy inventionfapplied thereto, i Y Figf2 is a horizontal section taken lon line 2,-2 of Fig. 1, Fig. 3 .is a vertical section ltaken on line 3 3 of Fig. l,

, Fig. 4 is av fragmentary viewsimilar to Fig. 2 but showing the walls in `bobbin releasing position, and

Fig. 5 is a fragmentary view showing the upperpart of the control member and associated links in a different position.

Referring `more particularlyfto E the drawings, .it will be seen thatI have provided a weft replenishing meehanism vhaving a framelO on which are mounted for Avertical Y ,motion-l slides vl1 arranged to controlcradles and angular. motn @iii .bearings 11,4: i ffflfid .en Athe frame is, a., @0191 Slidaliieef ,@911- namely,

may be had to Patent trol of the box motion and having fixed thereto fingers 16 and 17. By means of rod 18, which is given an upward movement every alternate pick and a downward movement on weft exhaustion indicating picks, the fingers 16 and 17 are required to move downwardly on alternate picks when the `shuttle is on the box end of the loom and to move upwardly at the indication of weft exhaustion when the shuttle is on the replenishing mechanism side of the loom. The slides 11 are provided with upper and lower bosses 19 and 20, respectively, which are so related that the fingers 1.6 and 17 will be operatively positioned for engagement with the bosses of but .one slide at a time,

the slide corresponding to the active shuttle. The matter thus far described is of the usual construction and for furthein description and operation thereof reference No. 1,030,748. My invention relates more particularly to the movable walls for the compartments and the means by which they are moved into and out of bobbin restraining position. Referring more' particularly to Figs. 2 and 3, it'iwill be seen that I have provided walls and 31 each of which is provided at the upper end thereof with a stud 32 to be received by a bearing cap 33 screwed or otherwise secured to the frame 10 and having the lower end thereof provided with another stud 34 received by a lug 35 extending from the frame. These pivoted walls 30 and 31 cooperate with the fixed walls 13 to form bobbin compartments 36, 37, 33 and 39, respectively, inwhich are located the bobbins W1, W2, W3 and W4, respectively.

ln order to impart motion to the pivoted walls the latter have extending thei'efroin studs 40 and 41, respectively, the outer ends yof which pass loosely through the links 42 and 43, respectively. Adjacent ends of links 42 and 43 are pivotally connected, as at44 and 45 respectively, to the upper end of a vertically movable control member 46 which slides through guides 47 and 48 on the frame 10. 1n order to actuate the'member 46 1 have secured to the color slide 15a lifter 49 which is fastened in adjusted position both angularly and longitudinally to the rod 15 by set .screwV 50. The lifter49 is located immediately Linder the broadened foot 51 formed on the bottoni of member 46 and is in operative relationship therewith in all positions of the color slide.

By referring to Figs. 2 and 3 it will be seen that the wall 30 has secured thereto spring plates 52`and 53 which form-boundaries for compartments 36 andV 37 respectively, and that wall 31 is similarly .pro-

respectively. provided with slits 56,v see Fig. 3,' which diy with spring Vplates 54Y and 55,

vided All of the spring' plates are vide the strips'into a plurality of individubobbins in the compartments.

engage the 1n order to hold the spring plates against the bobbins I have `provided a single tension spring 57 which extends between bosses 58 and 59 formed respectively on links 42 and 43. It will be observed that the effect of spring 57 is to drawV the outer ends of the angularly disposed links together and thus rotate the pivoted walls 30 and 31 to cause the spring plates carried thereby to engage and restrain rotation of the bobbinsin the various compartments. Also, it will be seen that the spring 57 serves to hold the conally yieldable sections which trol member 46 in lower position so that the y bottom thereof is iny position tobe engaged by the lifter as soon as the latter starts upward. I have not herein shown any stops for the links 42 and 43 as the movable walls will be engaged bythe bobbins and in this way held so as to prevent the member 46 from descending too close to the lifter 51.

In the normal operation of the replenishing mechanism all of the slides 11 are down and the-movable walls 30 and 31 are in the position indicated in Fig. 2 with the flexible portions thereof restraining rotation of the bobbins because of the action of Yspring 57. At indication of substantial weft exhaustion one or the other of the fingers 16 and 17 will lift the slide 11 corresponding to the active shuttle and at the same time the lifter 49, which moves with the fingers, will raise control member 46 so that the links 42 and 43 will assume a position similar to that shown in Fig. 5, the result of which is to move the walls 30 and 31 out of bobbin restraining position, as indicated in Fig. 4. llt is to be understood that the lifter 51 is held in raised position a fraction of a pick only and is then lowered by the action of the mechanism described in the aforesaid Patent No. 1,030,748. During the interval in which control member 46 is in raised position the cradle 12 corresponding to the active shuttle rocks and there is suficient time for the bobbins of the corresponding compartment to fall to thev next position before the member 46is again lowered to return the pivoted walls in contact with the bobbins.

Thus it will he seen that control member 46 and the walls 30 and 31 are moved to bobbin releasing position for. a fraction of a pick only after which they are again restored to bobbin restraining position irrespective of the length of time that the slide 11 corresponding to the indicating shuttle is in raised position. Furthermore, it will be seen that a single resilient member is sufficient not only to place the'bobbins under restraint but also to position the control member for actuation by the lifter. Also, it will be noted that the lifter is in position vto raise the control member irrespective of ywhich shuttle is active. In this connection it Will be seen that although the compartments 36 and 37 may be entirely empty of bobbins yet the member 46 Will be held in proper position with respect to the lifter so long as there are bobbins in any one of the compartments.

Having thus described my invention it will be apparent that changes and modiiications may be made therein by those skilled in the art Without departing from the spirit and scope of the invention and I do not Wish to be limited to the details herein disclosed, but What I claim is:

l. In a Weit replenishing mechanism for looms, a compartment for the bobbins, and means under control of the replenishing mechanism and normally restraining vibration of the bobbins to remove the restraint on the bobbins at indication of substantial weft exhaustion and to immediately thereafter move to bobbin restraining position on the same pick.

2. In a weft replenishing mechanism for looms, a bobbin compartment, means normally acting to restrain vibration Vof the bobbins, and means under control of the replenishing mechanism to move said first named means out of bobbin restraining position on the indicating pick and permitting said first named means to turn to bobbin restraining position on the same pick.

3. The combination in a weft replenisbing loom having a bobbin compartment and a bobbin discharging device therefor to receive a bobbin at indication of substantial Wett exhaustion and to deliver the bobbin to transfer position a plurality of picks after indication of iveft exhaustion, of means under control of the replenishing mechanism normally restraining vibration of the bobbins and operative to remove the restraint on the bobbins at indication ot' Weit exhaustion and to restore the restraint before the discharge device moves to deliver a bobbin to transfer position.

In a weft replenishing mechanism for looms, a bobbin compartment, devices to control the movement of the bobbinsr toward transfer position, an angularly and longitudinally movable member controlling the devices, means normally restraining vibration of the bobbins, and means independent of the devices and actuated directly from said angularly and longitudinally movable member to move the bobbin restraining means out of bobbin restraining position.

tion, and means under control of the repleno,

ishing mechanism to move said device from bobbin restraining position immediately after indication and to return said device to bobbin restraining position on the same pick of the loom.

6. In a weft replenisliing mechanism for looms, a plurality of pairs of bobbin compartments, a bobbin restraining member common to each pair of compartments and normally held in bobbin restraining posi-v tion, and means under control of the replenishing mechanism to move all of said bobbin restraining members out of restraining position at indication of substantial weft exhaustion and return them to bobbin restraining position on the same pick.

7. In a weft replenishing mechanism for looms, a plurality of pairs of bobbin compartments, a bobbin restraining device for each pair of compartments normally held in bobbin restraining position, a control mem-l ber common to all the devices to move each of said devices out of bobbin restraining position, and a longitudinally and' angularly movable device tolift said member in its angular movement in all longitudinal positions thereof.

8. In a replenishing mechanism for looms, a plurality of pairs of bobbin compartments, a device common to each pair normally restraining vibration of the bobbins of the associated compartments, a control member for said devices, positive connections between the control member and each device, and resilient means to hold said iirst named members in bobbin restraining position.

9. In a Wett replenishing mechanism for looms, a plurality of bobbin compartments, a devicefor each pair of compartments normally restraining vibration of the bobbns in 'the associated compartments, a control member for said devices, links positively connected to said devices and said control member and obliquely disposed With respect to the nath of movement of said control member, and means resisting movement of said links out of Obliquity with respect to the path of movement of said control member.

In testimony whereof I have hereunto afiixed my signature.

WALTER H. WAKEFIELD. 

